* update constraints on immutability changes

* introduce QRectF contentRect() const method so applets can easily get the content rect

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=745244

applet.cpp

@@ -611,7 +611,13 @@ bool Applet::isKioskImmutable() const
 
 void Applet::setImmutable(bool immutable)
 {
+    if (d->immutable == immutable) {
+        return;
+    }
+
     d->immutable = immutable;
+    // TODO: should we tell the applets too?
+    updateConstraints(ImmutableConstraint);
 }
 
 bool Applet::drawStandardBackground()
@@ -913,6 +919,11 @@ Location Applet::location() const
     return c->location();
 }
 
+QRectF Applet::contentRect() const
+{
+    return QRectF(QPointF(0, 0), contentSize());
+}
+
 QSizeF Applet::contentSize() const
 {
     int top, left, right, bottom;

applet.h

@@ -216,8 +216,12 @@ class PLASMA_EXPORT Applet : public Widget
         virtual Location location() const;
 
         /**
-         * Returns the area within which contents can be painted. If there is no
-         * background, then this is equivalent to boundingRect().size()
+         * Returns the rect that the contents are positioned within in local coordinates
+         */
+        QRectF contentRect() const;
+
+        /**
+         * Returns the area within which contents can be painted.
          **/
         QSizeF contentSize() const;